Figure 2.

Difference in reproductive activity of Eisenia between summer and winter and influence
of TiO2. All tests were performed according to OECD Test Guideline No. 222 [2] in natural soil. The figure shows some of the results as an example comparing the
control vessel (control from the tests with NM-105) with test soils containing 200
mg/kg NM-105 or NM-103. The mean number of offspring per vessel and the standard deviation
are presented.